Fix http response handling. Improve ObjectMapper. - #452

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions-ecosystem/action-regex-match@v2, cla-assistant/github-action@v2.1.1-beta. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/